Keep Your Battery Fresh Over The Winter. Charges battery and then keeps it topped off for a fresh battery all the time. Motorcycle batteries are more sensitive to cold than a car battery. Just a couple of days in cold weather can kill a battery. Battery Tender comes with a pig tail and plug to attach to your bike battery also a seperate pig tail with aligator clips for charging other batteries. Get one for the tractor or weekend Hot Rod. $32.99 + 6.99 shipping